Vise.



C. S. EVANS.

VISE.

APPLICATION FILED OCT. 28, I91 I.

1 9 1% 1 QW? a Patented June 1, 1915.

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C. S. EVANS.

VISE.

APPLICATION FILED 00128, 1911.

LMLQWW Patented June 1, 1915.

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VISE.

Application filed October 28, 1911.

To all whom it may concern Be it known that 1, CHARLES SUMNER EvANs, acitizen of the United States, and a resident of Berkeley, county ofAlameda, and State of California, have invented certain new and usefumprovements in Vises, of which the following is a specification.

The invention relates to Vises which are used by mechanics and woodworkers for holding the work to be operated upon and particularly tothat class of vises known as quick acting Vises.

The object of the invention is to provide a. quick acting vise, in whichthe engagement or disengage-ment of the screw with the nut is positivein action and which does not de pend upon mutilated threads orfrictional contacts to engage or disengage the screw and nut.

Another object of the invention is to proi vide a vise in which theobject between the jaws is held in a cushion grip immediately before andafter the full power of the screw is exerted.

Another object of the invention is to provide a vise which combines witha continuous screw action in either direction, a quick adjustment of themovable jaw at any point in the turn of the screw.

A further object of the invention is to provide a quick acting visewhich is simple in construction, and eflicient in operation and which iscomposed of few parts of great durability.

Another object of the invention is to provide an arrangement ofwork-holding dogs, which permits large pieces of work to be held by theVise.

The vise possesses other advantageous features, which, with theforegoing, will be set forth at length in the following descriptionwhere ll shall outline in full that form or embodiment of the inventionwhich I have selected for illustration in the drawings accompanying andforming part of the present specification. The novelty of the inventionwill be included in the claims succeeding said description. From this itwill be apparent that I do not restrict myself to the showing made bysuch drawings and description as I may adopt many Variations within thescope of my invention as expressed in said claims.

Referring to the drawings :Figure 1 is a perspective View of the vise,as seen from behind, several parts of the frame being broken away todisclose the operating parts,

Specification of Letters Patent.

Patented June 11, rats.

Serial No. 657,211.

Fig. 2 is a detail section through the frame and nut taken on the linewy Fig. 1. Fig. 3 1s a perspective View of the lower half of a. two partnut. Fig. 4 is a detail showing the means for holding the screw spindlein its elevated position. Fig. 5 is a detail showing the position of theparts in Fig. 4 when the screw spindle is in position to engage the nut.Fig. 6 is a perspective view of the front jaw of the vise showing thedogs and the means for holding them in position. Fig. 7 is a crosssection through the vise showing the arrangement of the parts. Fig. 8isa detail of the lower half nut showing the method of forming thethreads therein. Fig. 9 is a perspective view of the screw spindle andits carrying means. Fig. 10 is a plan or top view of the vise with thelocking member transposed to the opposite side of the nut, the front jawbeing made plain. Fig. 11 is a cross section through the vise shown inFig. 10, taken in front of the rear jaw, part of the jaw being brokenaway to disclose the operative parts. Fig. 12 is a detail showing a twopart nut closed on the screw spindle. Fig. 13 is a detail showing thescrew spindle raised and out of engagement with the nut. Fig. 14: is adetail of the screw spindle and its carrying means, showing a means ofobtaining the cushion grip.

The invention consists chiefly of a vise in which the screw spindle maybe moved transversely of itself, so that it may be moved out of or intoengagement with the nut. The screw spindle is mounted so that it remainsparallel to its normal working position when it is moved out of contactwith the nut. By this arrangement the screw spindle may be readily movedout of contact with the nut and the front jaw moved freely to thedesired position. The screw is then moved back into contact with the nutand the work clamped between the jaws by turning the screw. Means arealso employed for holding the screw in the nut and, preventing itsdisengagement as the work is being clamped.

The vise includes other novel features which will be set forthhereinafter.

The vise consists of a main containing frame 1 adapted to carry andsupport the operating parts, said frame being adapted to be fastened tothe under side of a workbench by means of screws passing through thelips 2'3, which are preferably formed integral with the main frame. Therear,

or stationary jaw 4 of the vise, is also preferably formed integral withthe main frame.

The front or movable jaw 28 is supported upon the slides 1213 which passthrough openings 15161718 in the main frame and which are connected attheir rear ends by the end tie 29. The front wall of the main frame isbossed at 10 and 11 to provide increased bearing surface for the slides.Bearing in the front jaw 28 and the end tie 29 is the rod 21 whichpasses through the apertures 19 and 20 in the main frame, and is movablelongitudinally with the sliding frame.

The screw spindle 28 is revoluble in the links 24 and 25 which aresecurely fastened to the rod 21, that part of the spindle which engagesthe links being of smaller diameter than the body of the spindle, sothat the spindle bears against the faces of the links. The front jaw 28and the rear tie 29 are arranged parallel to each other and are unitedby parallel slides 1213, to which slides the screw spindle is parallel.The links 2425 are made of equal length and are secured to or formedintegral with the rod 21 which is arranged parallel to the slides 1213,so that as the screw spindle is moved transversely it remains parallelto its normal operative position.

The shape of the structure formed of the rod 21 and the links 2425 maybe varied as desired without interfering with its function of causingthe spindle to remain parallel to its normal operative position.

That part of the frame and jaws through which the screw spindle passes,are provided with elongated apertures to allow the spindle to be movedtransversely, to move it into or out of engagement with the nut.

The nut which I employ is preferably a two-part nut formed of the upperpart nut 6 and the lower part nut 7 which when brought together form afull nut. In the construction shown in Fig. l, the nut is adapted tomove a slight distance longitudinally under the action of the screw asthe work is being clamped or unclamped. As the work is being clamped thenut is drawn forward into contact with the pad 5 on the main frame andunder the projection 22. This projection 22 looks the upper nut in'place and prevents it from becoming disengaged fr'om the screw aspressure is applied. The forward movement of the nut is resisted by thespring 40, thereby forming a cushion between the main frame and thesliding frame, so that a cushion grip between the jaw is obtainedimmediately before the work is positively gripped. This same result isobtained as the work is unclamped.

The upper nut is pivotally attached to the rod 83 fixed in the mainframe, and situated to one side of the screw spindle. For the purpose ofattaching the nut in this manner it is provided with integral arms 35having bearings on their outer ends to receive the rod 33. The lower nut7 is also provided with an integral arm 39 which engages the rod 33.This arm 39 preferably engages the rod between the arms 35 so that bothparts of the nut are moved longitudinally simultaneously. Thisarrangement holds the nut parts in proper position with respect to eachother, so that they may readily engage the screw when it is moved intoits operative position. The lower nut rests on the cross brace 34 of themain frame, and is provided with a projection 36 which engages a groovein the brace 34 and prevents the nut from becoming displacedtransversely as the screw spindle is lifted. The lower nut may also beprovided on its under surface with the pads 37-38 which facilitate thefitting of the parts when the vise is being assembled.

The ends of the nuts are flared out to give a greater surface contactwith the parts with which they contact, thereby holding the nut inposition on the screw when pressure is applied by the rotation of thescrew and holding the screw in contact with the lower nut.

The spring 40 which is arranged so that a cushion effect is obtainedbetween the main frame and the sliding frame is shown in Fig. 1 mountedon the rod 33 between the main frame and the arms 35 of the nuts. It isnot necessary that the spring be placed in this particular location toobtain the desired result and in Fig. 14 I have shown it arranged in adifferent location. In this instance the spring 72 is arranged on thescrew spindle 23 between the front jaw 28 and the T head 50 on thespindle. Since the spindle is in engagement with the nut, forming partof the stationary frame, the spring is disposed between the stationaryand movable frames and allows the cushion grip to be obtained. A washer76 is placed on the screw spindle to receive the thrust of the spring.In this construction the spindle has a limited longitudinal movement inits supporting frame or links to allow the spring to be compressed.

The spring in the construction shown in Fig. 1 is compressed only whenthe work is being finally gripped and acts to move the nut away from thelocking projection as the screw is turned to release the work. Thespring in Fig. 1, therefore, performs the double function of producing acushion grip and of moving the nut from the locked position and in theconstruction shown in Fig. 14, operates only to produce a cushion grip.When the cushion grip is not desired, however, the spring may be omittedin which case the nut being lighter than the sliding frame will be movedlongitudinally into and out of locked position with the initial turningof the screw to clamp or unclamp the object between the jaws.

Pivoted to the rear wall 9 of the main frame by the pin 42 is thelifting lever 41 which contacts with the screw spindle and is operatedby the transverse movement thereof. The lever 41 is preferably providedwith an aperture 45 through which the screw spindle passes, so that itis positively operated by a transverse movement of the spindle in eitherdirection. The lever 41 is provided with a slot 43 which is engaged by apin 44 secured to the upper part of the nut 6. It is evident, therefore,that as the screw spindle is moved upward the lever 41 operates to raisethe upper nut. The position of the slot in the lifting lever and the pinin the nut is such that the upper nut is moved.

a distance approximately equal to twice the throw of the spindle.Therefore, the lifting of the spindle raises it out of engagement withthe lower nut and raises the upper nut out of contact with the spindle.Therefore, when the spindle is raised the sliding frame may be readilymoved by pushing or pulling with the hand. The links 24 and 25 in whichthe spindle is mounted, cause it to remain at all times parallel to itsoperative position, thereby insuring ready engagement or disengagementwith the nut as the screw is lowered or raised. The operation ofthrowing the screw in or out of engagement may readily be performed withone hand, the operative merely raising or lowering the screw spindle bygrasping the T head 50 or the handle 52. This allows the other hand tobe used in setting or adjusting the work.

The hand of the operator is suflicient to support the weight of thespindle and its supporting parts during the rapid adjustment of thefront jaw, but for the purpose of convenience an automatic catch may beprovided to hold the spindle in the elevated position. This catch mayconsist of the hook 46 preferably pivoted to the front jaw at 47, andarranged to be actuated by gravity to engage the spindle.

The rotation of the screw, after the rapid adjustment of the jaw iscomplete causes the pin 48 in the screw spindle to strike the lip 49 onthe hook, forcing the latter to one side and permitting the screwspindle to drop into the nut. The pin 48 and the lip 49 are soplaced andproportioned that they do not touch except when the screw is rotated forthe purpose of releasing the spindle from the hook. Further, the pin 48is so placed relatively to the threads of the nut that it releases thecatch only at the one point in the revolution of the screw when thelatter will drop into immediate engagement with the threads of the nut.

The screw on the spindle is preferably formed with a square thread whichmay be slightly backed off or slanted on the rear side of the thread,somewhat after the style of the ordinary buttress thread, since suchthread will not have a tendency to raise the spindle out of the nut asthe work is being clamped and is readily released from the nut when notunder pressure.

In order to facilitate ready engagement and disengagement of the spindleand the half nut, the ends of the threads are ground or chamfered asshown at 84 and 85 and the width of the ends 86 and 87 of the threadsare reduced. This will prevent a jamming or sticking of the threads ofthe spindle and the nut at that point. Clearance is also allowed betweenthe threads of the nut and spindle to facilitate engagement anddisengagement.

The front jaw of the vise may be made plain as shown in Fig. 10, or withone or two dogs, as shown in Figs. 1 and 6. The dog consists of a head63, preferably of a fiat half-cylindrical shape and provided with smoothor toothed gripping edges. The head is secured to a cylindrical shank64, the lower portion 65 of which is of reduced diameter and is providedadjacent to its lower end with a groove in which is seated an annularspring 67. The spring is of sli htly larger external diameter than there uced portion 65, so that it projects be yond the face of saidportion.

The sockets for the dogs consist of semicylindrical thickenings 5556 ofthe jaw, terminating at the top in a seat 68 for the dog head, and ineach there is a hole 69, the diameter of which, for a depth equal to thelength of the shank 64, is sufficient to give a snug sliding fit whenthe shank is inserted therein. The lower portion of the hole is reducedto a diameter slightly larger than the small end 65 of the shank andslightly smaller than the diameter of the circular spring 67 held in thegroove. lVhen the dog is inserted in the socket it will fall by its ownweight until the spring reaches the beginning of the smaller end of thesocket. At this point the dog projects above the top of the front jaw,the maximum amount ordinarily required in its use and it is thereforemainly a precaution against wrong usage that no means are provided tohold the dog in a more elevated position. From the point where thespring reaches the beginning of the smaller end of the socket, itrequires pressure to push the dog deeper into the socket due to theresistance exerted by the spring. Therefore, the vertical adjustment ofthe dog is merely a matter of raising or lowering the dog with thefingers within the limit mentioned.

While the spring 67n1aintains the vertical adjustment of the dog, itdoes not interfere with the revoluble adjustment of the shank within thesocket at any point of its vertical adjustment, and this function is anessential element in its use, as it permits the dog head to presenteither its fiat or curved gripping faces to the work. A third dog 70,being of substantially the same shape as the others, but with a largerhead and a short shank, is adapted to seat in holes 71 in the bench top,to form the rear stop necessary in using the dogs on the jaw. The innerface of the front jaw is often provided with a wooden lining 60, andthis is provided with recesses 81-82 to allow the fingers to be insertedto raise the dogs.

' When the dogs are being used to grip and hold an article, such as aring, by pulling outward thereon, it is evident that the screw spindleis turned in the opposite direction to which it is turned when anarticle is to be gripped between the jaws. This reverse movement willcause the nut to move backward toward the rear wall 9 clamping thelifting lever 41 between the nut and the wall. The lifting lever beingthus locked in position it is evident that the upper part of the nutcannot rise and the screw cannot become disengaged from the nut. The nutis, therefore, securely locked in position without the use of thelocking lug 22. In

the vise shown in Figs. 10, 11, 12 and 13, I make use of this fact forlocking the nut in place when an article is gripped between the jaws,without the use of the locking lug 22, by transposing the position ofthe lifting lever 41. Instead of placing the lifting lever between thenut and the rear wall 9, as shown in Fig. 1, I place itbetween the nutand the front jaw 4. When work is clamped between the jaws the liftinglever is clamped between the nut and the pad 5, the frictional contactbeing sufficient to prevent the lever from being raised. The lever 41,therefore, performs the additional function of locking the upper nutabout the screw thereby locking the screw in the lower nut and also actsdirectly on the screw to lock it in the lower nut. V In the constructionshown in these figures, no cushion grip is possible between the jaws, asthe springs have been omitted. A cushion grip may be obtained in thisconstruction by employing the springs arranged in either of thepositions shown in Figs. 1 or 14. The action of the vise, however, inall other respects is the same as that shown in Fig. 1. In reverse use,the frictional contact between the flared end of the nut and the pad 8on the rear wall of'the main frame is sufficient to lock the nut aboutthe screw.

Throughout the specification I have referred to the nuts as half nuts,but it is to be understood in the sense of part nuts, as it is evidentthat the construction could readily be changed to accommodate nuts ofother divisions than halves.

The expression part nut is used to designate a nut which is not a wholenut formed in one piece and includes whole nuts formed of a plurality ofsegmental parts or a segmental part alone.

I claim:

1. In a vise, a nut, a screw spindle terminating in a head, and supportspermitting said spindle to be moved transversely while maintaining itsparallelism into and out of engagement with said nut by lateral pressureupon said head.

2. In a vise having a jaw adapted to be moved by a screw spindle, ascrew spindle terminating in a head, said screw spindle being movabletransversely by lateral pressure upon said head, and means engaging saidspindle adapted to maintain the parallelism of the spindle in all itspositions.

3. In a vise, a main frame, a nut, a slidable frame, and a screw spindleterminating in a head, said spindle being movable transversely todisengage or engage said nut by lateral pressure upon said head, andmeans for maintaining said spindle parallel to its normal operativeposition.

4. In a vise, a slidable frame, a screw spindle terminating in a head,means pivotally attached to said frame adapted to carry said screwspindle and to maintain its parallelism when shifted transversely bylateral pressure upon said head.

5. In a vise, a main frame, a nut engaging said frame, a slidable frame,a screw spindle terminating in a head carried by said slidable frame,supports permitting said spindle to be moved at right angles to its axisinto and out of engagement with said nut by lateral pressure upon saidhead, and means for locking the spindle in engagement with the said nut.

6. In a vise, a main frame, a nut engaging said frame, a slidable frame,a screw spindle terminating in a head carried by said slidable frame,supports permitting said spindle to be moved transversely whilepreserving its parallelism into and out of engagement with said nut bylateral pressure upon said head, and means for supporting said spindleout of engagement with said nut.

7. In a vise, a main frame, a nut engaging said frame, a slidable frame,a screw spindle terminating in a head carried by said slidable frame,supports permitting said spindle to be moved transversely whilepreserving its parallelism into and out of engagement with said nut bylateral pressure upon said head, means for supporting the spindle out ofengagement with said nut and means operated by the turning of thespindle to release it from said supporting means.

8. In a vise, a part nut, a screw spindle adapted to be movedtransversely into and out of engagement with said nut and meansoperative by the movement of the spindle away from one part of the nutto cause the other part to move away from the spindle.

9. In a vise, a two part nut, a screw spindle adapted to be movedtransversely into and out of engagement with said nut, a lifting leverengaging said spindle and means connecting said lifting lever with oneof the nut parts.

10. In a vise, a main frame, a part nut engaging said frame, a slidingframe, a screw spindle carried by said sliding frame adapted to be movedtransversely into and out of engagement with said nut, and a leverengaging said spindle pivoted to said main frame and arranged betweensaid main frame and said nut.

11. In a vise, a main frame, a two part nut engaging said frame, aslidable frame, a screw spindle carried thereby adapted to engage saidnut, means for supporting said spindle to allow it to be movedtransversely and a lever pivoted to the main frame and engaging saidspindle, said lever being provided with a groove adapted to be engagedby a pin to one of the nut parts.

12. In a vise, a main frame, a nut engaging said frame, a slidableframe, a longitudinally disposed rod in said frame, links of equallength attached to said rod and a screw spindle carried by said linksadapted to be moved transversely into and out of engagement with saidnut.

13. In a vise, a main frame, a nut engaging said frame, a slidableframe, a longitudinally disposed rod bearing in the opposite ends ofsaid frame, links of equal length attached to said rod adjacent to theends, a screw spindle rotatably supported in said links and means forlimiting the movement of said links adapted to be moved transverselyinto and out of engagement with said nut.

14:. In a vise, a main frame, a nut engaging said main frame, a slidableframe, a screw spindle carried thereby adapted to engage said nut, and aspring arranged between said main frame and said sliding frame arrangedtov be compressed as the work is gripped between the jaws of the v1se.

15. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle carried thereby adapted to engage said nut, saidnut being capable of limited longitudinal movement with respect to saidmain frame, and a spring interposed between said nut and said main framearranged to be compressed as the work is gripped between the jaws of thevise.

16. In a vise, a main frame, a two part nut engaging said main frame andcapable of limited longitudinal movement with respect thereto, a slidingframe, a screw spindle carried thereby adapted to engage said nut and aprojection on said main frame under which the part nut is adapted to bedrawn as the screw is rotated.

17. In. a vise, a main frame, a two-part nut arranged therein, andcapable of limited longitudinal motion with respect to said frame, aslidable frame, a screw spindle carried thereby adapted to engage saidnut, a projection on the main frame under which said nut is adapted tobe drawn as the spindle is rotated and a spring arranged to becompressed as said nut is drawn under the projection.

18. In a vise, a main frame, a two-part nut arranged therein capable oflimited longitudinal movement with respect to said frame, a slidableframe a screw spindle carried thereby adapted to engage said nut, saidspindle being adapted to be moved transversely into and out ofengagement with said nut and a lever engaging said spindle arrangedbetween the nut and the main frame.

19. In a vise, a main frame, a two-part nut arranged therein capable oflimited longitudinal movement with respect to said frame, a slidableframe, a screw spindle adapted to engage said nut carried thereby, saidspindle being capable of limited trans verse movement, a lifting leverengaging said spindle arranged between the nut and the main frame andmeans connecting said lever with one part of said nut to cause said partto move away from the spindle as the spindle is moved out of engagementwith the other part.

20. In a vise, a main frame, a two part nut arranged therein capable oflimited longitudinal movement with respect to said frame, one part ofsaid nut being movable transversely of the frame, a slidable frame, ascrew spindle, adapted to engage said nut, carried thereby, said screwspindle being movable transversely, a lifting lever pivoted to the mainframe, engaging said spindle between the nut and the main frame, andmeans connecting said lever with the transversely movable part of saidnut, tocause said part to be moved transversely simultaneously with thetransverse motion of the spindle, the connection between the lever andthe movable part of the nut being such 1 that the nut part moves througha greater distance than the spindle.

21. In a vise, a main frame, a nut formed of a plurality of partsarranged therein, said nut beingcapable of limited longitudinal movementwith respect to said frame, a slidable frame, a screw spindle carriedthereby adapted to be moved transversely into and out of engagement withsaid nut and means for holding said nut parts alined transversely.

22. In a vise, a main frame, a nut formed of a plurality of partsarranged therein, a slidable frame, a transversely movable screw spindlecarried thereby, said spindle being movable into and out of engagementwith said nut, means operated by the transverse movement of the spindleout of one nut part to cause the other nut parts to move away from thespindle and means preventing the transverse movement of the first nutpart, as the spindle is moved out of engagement.

28. In a vise, a main frame, a slidable frame, a half nut and a screwspindle adapted to be moved transversely into and out of engagement withsaid nut, the threads of said nut being beveled at their ends in a planeparallel to the axis of the helical curve of said threads.

24:. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle carried by said frame adapted to be movedtransversely into and out of engagement with said nut, means forsupporting said spindle out of engagement with the nut and meansforreleasing said spindle from said supporting means when the threads ofthe spindle are in line with the grooves between the threads of the nut.

25. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle carried by said frame adapted to be movedtransversely into and out of engagement with said nut, a hook forsupporting the spindle out of engagement with the nut and a projectionon the spindle adapted to engage said hook and move it out of engagementwith the spindle.

26. In a vise, a main frame, a nut engaging said frame, a slidableframe, a. screw spindle carried by said frame adapted to be movedtransversely into and out of engagement with said nut, a hook forsupporting said spindle out of engagement with the nut, a tooth on saidhook and a projection on th spindle adapted to engage said tooth andmove the hook out of engagement with the spindle when the threads of thespindle are alined with the grooves between the threads of the nut.

27. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle carried by said slidable frame adapted to bemoved transversely while maintaining its parallelism to its normaloperative position into and out of engagement with said nut, means forlocking the spindle in engagement with said nut and means for supportingit out of engagement with the nut.

28. In a vise, a nut, a screw spindle terminating in a head, saidspindle adapted to engage revolubly in either direction with said nut,supports permitting said spindle to be moved transversely to disengageor engage said nut by lateral pressure upon said head, and means forinsuring parallelism in said transverse movement.

29. In a vise, the combination of two opposing jaws with a nut and ascrew spindle threaded for a distance to correspond with the openingcapacity of the jaws and terminating at its outer end in a handle piece,and means whereby said spindle may be shifted while maintaining itsparallelism, out of and into engagement with said nut by directtransverse pressure against said handle.

30. In a vise, a main frame, a nut, a slidable frame, a screw spindleadapted to engage the nut, and means carried by said slidable frameadapted to rock about pivots on a line parallel to said screw spindleand adapted to revolubly hold it and to shift it transversely whenlateral pressure is applied to the end of said screw spindle.

31. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle, means pivotally attached to said slidable frameadapted to revolubly carry said screw spindle, said screw spindle beingadapted to be moved transversely about said pivots into and out ofengagement with said nut and means for locking said spindle inengagement with said nut.

32. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle, means pivotally attached to said slidable frameadapted to revolubly carry said screw spindle, said screw spindle beingadapted to be moved transversely about said pivots into and out ofengagement with said nut and means for supporting said spindle out ofengagement with said nut.

33. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle, means pivotally attached to said slidable frameadapted to revolubly carry said screw spindle, said screw spindle beingadapted to be moved transversely about said pivots into and out ofengagement with said nut, means for supporting said spindle out ofengagement with said nut and means operated by the turning of the saidspindle to release it from said supporting means.

34:. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle terminating in a head, and means pivotallyattached to said slidable frame adapted to revolubly hold said screwspindle and to maintain its parallelism to the axis of the nut when saidmeans are rocked about said pivots by direct lateral pressure upon saidhead.

35. In a vise, a front jaw provided with a cylindrical socket, a dogshank adapted to engage said socket and to be revolubly and verticallyadjustable therein, a spring disposed between the lower portion of saiddog shank and said front jaw to maintain the vertical adjustment of saiddog shank, and a head on said shank.

36. In a vise, a movable jaw, slidable frame carrying said movable jaw,a socket in said jaw, a vertically and revolubly adjustable dog arrangedin said socket, said dog having a head of the form described, and meansfrictionally disposed between said jaw and said dog to maintain thevertical adjustment of said dog in said socket.

37. In a vise, a front jaw provided with a cylindrical socket the lowerportion of which is of decreased diameter, a dog shank adapted to engagesaid socket and adapted to be revolubly and vertically adjustabletherein and means carried in said shank adapted to frictionally engagethe wall of said socket at the smaller end.

38. In a vise, the combination of a movable jaw provided with twovertically and revolubly adjustable dogs, and a detachable revolubly andvertically adjustable bench stop to be located at the apex of thetriangle of which the two dogs in the said movable jaw represent theother two apeces, for the purpose of providing a three-point contact forany irregular object.

89. In a vise, a movable jaw provided with a vertically arrangedcylindrical socket, the lower portion of which is of smaller diameterthan the upper portion, a dog having a cylindrical shank the lowerportion of which is of smaller diameter than the upper portion, and aspring engaging said lower portion, adapted when the dog is in place tofrictionally engage the smaller portion of the socket.

40. In a vise, a main frame, a nut, a slidable frame and a screw spindleadapted to operatively engage the nut, said screw spindle being movabletransversely maintaining its parallelism, into and out of engagementwith said nut by direct lateral pressure against the end of saidspindle.

-11. In a vise, a main frame, a nut, a slidable frame, a screw spindlebodily movable transversely, means for positively holding said screw inparallelism with its original position during the transverse movement,and means for locking said screw spindle in engagement with said nut.

42. In a vise, a main frame,a nut, a slidable frame, a screw spindleadapted to be moved transversely into and out of operative engagementwith said nut, means for positively insuring parallelism in saidtransverse movement, and means for supporting said spindle out ofengagement with said nut.

43. In a vise, a main frame, a nut engaging said frame, a slidableframe, a screw spindle carried by said slidable frame adapted to bemoved transversely into and out of engagement with said nut, a hook forsupporting the spindle out of engagement with the nut, and means carriedby said spindle to engage said hook and move it out of engagement withsaid spindle.

4: 1. In a vise, a nut and a screw spindle adapted to engage said nut,said spindle being movable transversely as a prime mover, and meansoperative by the movement of the spindle to open said nut and releasethe spindle therefrom.

In testimony whereof, I have hereunto set my hand at San Francisco, Cal,this 21st day of October, 1911.

CHARLES SUMNER EVANS.

In presence of H. G. PRos'r, R. I-IEFFERNAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

It is hereby certified that in Letters Patent No. 1,141,237, grantedJune 1, 1915,

upon the application of Charles Sumner Evans, of Berkeley, California,for an improvement in Vises, errors appear in the printed specificationrequiring correction as follows: Page 5, line 39, claim 13, after theword links insert the Words adapted to be moved transversely into andout of engagement with said nut; same page and claim, lines 40-42,strike out the Words adapted to be moved transversely into and out ofengagement with said nut and that the said Letters Patent should be readwith these corrections therein that the same may conform to the recordof the case in the Patent Office. v

Signed and sealed this 9th day of November, A. D., 1915.

J. T. NEWTON,

Acting Commissioner of Patents.

[SEAL]

